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The Dyeing of Cellulose Acetate with Non‐ionic Dyes
Author(s) -
Majury T. G.
Publication year - 1954
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1954.tb02004.x
Subject(s) - cellulose triacetate , dyeing , cellulose acetate , chemistry , diffusion , aqueous solution , absorption (acoustics) , ionic bonding , activation energy , cellulose , polymer chemistry , substrate (aquarium) , molecule , chemical engineering , organic chemistry , materials science , ion , thermodynamics , composite material , engineering , physics , oceanography , geology
Measurements of the rates of dyeing of five “model” dyes on cellulose secondary acetate and triacetate have been used to evaluate the apparent diffusion coefficients of the dyes. The coefficients are shown to have a twofold activation energy: one part is identifiable with the free energy of dyeing, and the other is attributable to mechanical obstruction of the diffusing dye by the body of the substrate. This suggests that a dye molecule penetrating cellulose acetate undergoes alternate absorption by the acetate and solution by the water, and that diffusion takes place in the aqueous phase.